ULN2803ADWR by Texas Instruments is a peripheral driver with 8 functions, open-collector output characteristics, and built-in transient protections. It operates b/w -40 to 85°C, has a max supply voltage of 3V, and is ideal for buffer or inverter-based applications requiring sink current flow direction.
STM32F405RGT6 by STMicroelectronics is a 32-bit microcontroller with 2/3.3V power supplies, 16 external interrupts, and 196608 RAM bytes. Ideal for industrial applications, it features CAN(2), I2C(3), SPI(3) connectivity options and operates at a max clock frequency of 26 MHz. With low power mode and DMA support, it offers versatile performance in compact dimensions.
TRANS VOLTAGE SUPPRESSOR DIODE; Surface Mount: YES; Maximum Repetitive Peak Reverse Voltage: 18 V; Nominal Breakdown Voltage: 21.05 V; Maximum Time At Peak Reflow Temperature (s): 10; JESD-609 Code: e3;